Furnace repair heating and air conditioining sales service and installation. (905) 403-9914 Mississauga Oakville Burlington, Streetsville, Lorne Park, Port Credit, Etobicoke, Toronto Tankless, humidifier. Redtag furnace, duct cleaning, parts filters air conditioning.

Rinnai tankless water heater repair service and maintenance.

(905) 403-9914 service and repair . 


Rinnai Tankless hot water heater error codes listed below. 

Rinnai tankless water heater repair services , we install and do full maintenance and service on all these Rinnai models, in the Mississauga Oakville areas including Burlington Etobicoke Toronto, Milton . 

Call for fast Rinnai tankless water heater repair service (905) 403-9914

 Last up to twice as long as regular hot water tanks and have twice the warranty length. Plus, they save you energy by heating water only when it is needed. Goverment rebates are also often available in Canada. Technology to Improve Your everyday Lifestyle.

Rinnai tankless water heater repair and service maintenance serving the GTA areas. Mississauga Oakville Burlington, Etobicoke ,Toronto. 

RU130iN RU130iP RU130eN RU130eP RU160iN RU160eN RU160eP RU180iN RU180iP RU180eN RU180eP RU199iN RU199iP RU199eN RU199eP



There are 24 neighbourhoods in Mississauga:[38] Applewood Central Erin Mills Churchill Meadows Clarkson Cooksville Creditview East Credit Erin Mills Erindale Fairview Hurontario Lakeview Lisgar Lorne Park Malton Meadowvale Meadowvale Village Mineola Mississauga Valleys Port Credit Rathwood Rockwood Village Sheridan Streetsville. The GTA Toronto, The Beaches, Etobicoke. We service and do repair of Rinnai tankless water heaters as well as many other tankless heaters. 


Rinnai tankless hot water heater 

Lorne Park Mississauga Oakville, Burlington, Etobicoke , Toronto, Scarborough, Tankless water heater repair services.



Rinnai tankless hot water heater error codes and Rinnai tankless water heater replacement parts in Canada.

905 403-9914


Error Code – Fault 11

Rinnai FAULT  cose  = No Ignition

Error Code Solutions

  1. Check that the gas is turned on at the water heater, gas meter, or cylinder.
  2. Ensure gas type and pressure is correct.
  3. Ensure gas line, meter, and/or regulator is sized properly.
  4. Verify all air was purged from gas lines after installation.
  5. Verify gas type dip switch on PC board is switch to proper gas type position.
  6. Ensure appliance is properly grounded.
  7. Disconnect EZConnect or MSA controls to isolate the problem.
  8. Ensure igniter is operational.
  9. Check igniter wiring harness for damage.
  10. Check gas solenoid valves for open or short circuits.
  11. Remove burner cover and ensure all burners are properly seated.
  12. Remove burner plate and inspect burner surface for condensation or debris.

Replacement Parts Toronto



Error Code – 12

FAULT = Flame Failure

Error Code Solutions

  1. Check that the gas is turned on at the water heater and gas meter.
  2. Check for obstructions in the flue outlet.
  3. Ensure gas line, meter, and/or regulator is sized properly.
  4. Ensure gas type and pressure is correct.
  5. Bleed all air from gas lines.
  6. Ensure proper Rinnai venting material was installed.
  7. Ensure condensation collar was installed properly.
  8. Ensure vent length is within limits.
  9. Verify dip switches are set properly.
  10. Ensure appliance is properly grounded.
  11. Disconnect keypad.
  12. Disconnect EZConnect or MSA controls to isolate the problem. Replace if necessary.
  13. Check power supply for loose connections.
  14. Check power supply for proper voltage and voltage drops.
  15. Ensure flame rod wire is connected.
  16. Check flame rod for carbon build-up.
  17. Disconnect and reconnect all wiring harnesses on unit and PC board.
  18. Check for DC shorts at components.
  19. Check gas solenoid valves for open or short circuits.
  20. Remove burner plate and inspect burner surface for condensation or debris.

Replacement Parts Mississauga Oakville, Burlington, Toronto.

Error Code – 14

FAULT = Thermal Fuse

Error Code Solutions

  1. Check gas type of unit and ensure it matches gas type being used.
  2. Check for restrictions in air flow around unit and vent terminal.
  3. Check for low water flow in a circulating system causing short-cycling.
  4. Ensure dip switches are set to the proper position.
  5. Check for foreign materials in combustion chamber and/or exhaust piping.
  6. Check heat exchanger for cracks and/or separations.
  7. Check heat exchanger surface for hot spots which indicate blockage due to scale build-up.
  8. Refer to instructions in manual for flushing heat exchanger.
  9. Measure resistance of safety circuit.
  10. Ensure high fire and low fire manifold pressure is correct.
  11. Check for improper conversion of product.

Replacement Parts

Error Code – 16

FAULT = Over Temperature Warning

Error Code Solutions

  1. Check for restrictions in air flow around unit and vent terminal.
  2. Check for low water flow in a circulating system causing short-cycling.
  3. Check for foreign materials in combustion chamber and/or exhaust piping.
  4. Check for clogged heat exchanger. Flush system if necessary.

Replacement Parts

Error Code – 19

FAULT = Electrical Grounding

Error Code Solutions

  1. Check all components for electrical short.

Replacement Parts

Error Code – 25

FAULT = Condensate Trap is full

Error Code Solutions

  1. Inspect condensate drain line for blockage.
  2. Inspect condensate trap and tank inside cabinet for blockage.
  3. Ensure condensate line has an air gap between the unit and drain line leaving the water heater.
  4. Check sensor wiring harness for loose, broken or damaged connections from sensor back to PC board.
  5. If condensate tank is draining and the unit is still throwing a code 25 replace condensate tank with sensor.

Replacement Parts

Error Code – 31

FAULT = Burner Thermocouple

Error Code Solutions

  1. Check low/high fire manifold pressures for proper settings.
  2. Verify all dip switches are set to the proper position on the PC board.
  3. Measure milli‐volt (mV) reading of burner thermocouple. The thermocouple milli‐volt range should be between 20 to 27 mV under normal combustion.
  4. Replace thermocouple.

Replacement Parts

Error Code – 32

FAULT = Outgoing Water Temperature Sensor Fault

Error Code Solutions

  1. Check sensor wiring for damage.
  2. Measure resistance of sensor.
  3. Clean sensor of scale build-up.
  4. Replace sensor.

Replacement Parts

Error Code – 33

FAULT = Heat Exchanger Outgoing Temperature Sensor Fault

Error Code Solutions

  1. Check sensor wiring for damage.
  2. Measure resistance of sensor.
  3. Clean sensor of scale build-up.
  4. Replace sensor.

Replacement Parts

Error Code – 34

FAULT = Combustion Air Temperature Sensor Fault

Error Code Solutions

  1. Check for restrictions in air flow around unit and vent terminal.
  2. Check sensor wiring for damage.
  3. Measure resistance of sensor.
  4. Clean sensor of scale build-up.
  5. Ensure fan blade is tight on motor shaft and is in good condition.
  6. Replace sensor.

Replacement Parts

Error Code – 41

FAULT = Freeze Protection Sensor for External Units

Error Code Solutions

  1. Check sensor wiring harness for loose, broken or damaged connections from sensor back to PC board.
  2. Ensure sensor is open to outside air and not covered with insulation.
  3. With water supply still isolated and sensor removed from unit, check the resistance readings of this component using a volt/ohm meter capable of reading 20K ohms. Typical resistance values are 11.4 – 14K ohms at 59 degrees ⁰F, 6.4 – 7.7K ohms at 86⁰F, 3.6 – 4.5K ohms at 113⁰F, 2.2 – 2.7K at 140 ⁰F or 0.6 – 0.8K at 221 ⁰F.
  4. If sensor readings are correct re‐install this component ensuring the small O‐ring is still intact in sensor well before installation. Place a small amount of grease or lubricant on the O‐ring to prevent damaging it during installation. Turn water supply back on and check for leaks around this component. Next re‐fire the unit to see if you still get a code 41. If so, replace the sensor.

Replacement Part

Error Code – 51

FAULT = Inlet Water Temperature Sensor

Error Code Solutions

  1. Check sensor wiring harness for loose, broken or damaged connections from sensor back to PC board.
  2. Turn off water supply to water heater and drain system down. With no water left in hot water supply lines remove the sensor and check it for scale build up. Clean off any substance found on this component.
  3. With water supply still isolated and sensor removed from unit, check the resistance readings of this component using a volt/ohm meter capable of reading 20K ohms. Typical resistance values are 11.4 – 14K ohms at 59 degrees ⁰F, 6.4 – 7.7K ohms at 86⁰F, 3.6 – 4.5K ohms at 113⁰F, 2.2 – 2.7K at 140 ⁰F or 0.6 – 0.8K at 221 ⁰F.
  4. If sensor readings are correct re‐install this component ensuring the small O‐ring is still intact in sensor well before installation. Place a small amount of grease or lubricant on the O‐ring to prevent damaging it during installation. Turn water supply back on and check for leaks around this component. Next re‐fire the unit to see if you still get a code 51. If so, replace the sensor.

Replacement Parts

Error Code – 52

FAULT = Modulating Solenoid Valve Signal Abnormal

Error Code Solutions

  1. Check modulating gas solenoid valve wiring harness for loose or damaged terminals.
  2. Measure resistance of valve coil.
  3. Check voltage to the POV valve while unit is trying to fire. If you have the proper voltage but keep getting an error code proceed to the next item.
  4. If code 52 still appears after performing the above inspection replace the PC board.

Replacement Parts

Error Code – 57

FAULT = Burner Overheat Bi‐metal Switch

Error Code Solutions

  1. Check burner overheat bi‐metal switch wiring harness for loose, broken or damaged connections from sensor back to PC board.
  2. Verity unit is connected to the proper type gas.
  3. Verify low/high fire manifold pressures are set properly.
  4. Clean sensor.
  5. If unit was ever converted from one gas type to another, verify the conversion process was preform per the manufacturer’s instructions and all pressures and dip switch were set to match the gas type unit was converted too.
  6. Replace sensor

Replacement Parts

Error Code – 58

FAULT = Secondary Heat Exchanger Sensor

Error Code Solutions

  1. Check sensor wiring harness for loose, broken or damaged connections from sensor back to PC board.
  2. This code indicates a scale build‐up inside the secondary heat exchanger and it needs to be flushed to prevent damage.
  3. Descale unit with a tankless flush

Replacement Parts

Error Code – 61

FAULT = Combustion Fan Failure

Error Code Solutions

NOTE: Before servicing fan motor turn off power supply to the unit.

  1. Check sensor wiring harness for loose, broken or damaged connections from sensor back to PC board.
  2. Remove fan motor with power supply to product turned off. Inspect blower wheel to ensure it turns freely.
  3. Check fan housing for debris that could prevent the fan wheel from turning.
  4. Measure fan motor winding resistance, see technical data sheet behind front cover or in service manual for proper resistance readings. If windings are open replace motor.
  5. If motor windings are within specifications and fan motor turns freely, replace PC board.

Replacement Parts

Error Code – 65

FAULT = Water Flow Control Fault

Error Code Solutions

  1. The water flow control valve has failed to close during the bath fill function. Immediately turn off the water and discontinue the bath fill function.
  2. Check wiring harness to the water flow servo for loose, broken or damaged connections from servo back to PC board.
  3. Turn off the power to the water heater and then reapply to see if code resets.
  4. Contact a qualified or licensed contractor to service the appliance.
  5. Replace water flow control servo.

Replacement Parts

Error Code – 70

FAULT = PC Board Fault

Error Code Solutions

  1. Check all wiring harness at the connection to the PC board to ensure they are not loose, broken or damaged.
  2. Check all dip switches to ensure they are set to the proper position.
  3. Replace the PC Board.

Replacement Parts

Error Code – 71

FAULT = SV0, SV1, SV2, and SV3 Solenoid Valve Circuit Fault

Error Code Solutions

  1. Check wiring harness to all solenoids for damage and/or loose connections.
  2. Measure resistance of each solenoid valve coil.
  3. Check for moisture in plastic tubing on internal units from bottom of combustion box back to gas valve. If moisture is found in this tube replace gas valve. In addition; remove burner manifold and burner assembly to determine what is causing the moisture. Look for a leaking heat exchanger or condensation coming from the vent system.
  4. If you are still getting a code 71 replace the gas control valve.
  5. Replace PC board

Replacement Parts

Error Code – 72

FAULT = Flame Sensing Device Fault

Error Code Solutions

  1. Ensure flame rod is touching flame when unit fires.
  2. Check all wiring to flame rod for damage.
  3. Remove flame rod and check for carbon build-up; clean with sand paper.
  4. Check inside burner chamber for any foreign material blocking flame at flame rod.
  5. Measure micro amp output of sensor circuit with flame present.
  6. Replace flame rod.

Replacement Parts

Error Code – 73

FAULT = Burner Thermocouple Fault

Error Code Solutions

  1. Check wiring harness at burner thermocouple back to PC board for loose, broken or damaged wiring or connections.
  2. Verify all dip settings are set to the proper alitiube per the tech sheet found under the front panel of your unit.
  3. Confirm low/high fire manifold gas pressures are set to factory specification per alitiude unit is installed at. Manifold gas pressure settings and directions can be found on the tech sheet under front panel of the unit.
  4. Replace burner thermocouple. If code reappears after replacing this component replace PC board.

Replacement Parts

Error Code – 79

FAULT = Water Leakage Detected

Error Code Solutions

  1. Check wiring harness at leak detector for loose, broken or damaged wiring or connections.
  2. Check the heat exchanger and all piping inside the unit for leaks.
  3. If no leaks are found inspect inside of cabinet for signs of water pooling on bottom pan of water heater. Wipe or blow out any water found in cabinet. Dry off leak sensor and restart unit.
  4. If no water is found in cabinet unplug sensor and start water heater. If unit operates with sensor unplugged replace sensor and screw.

Replacement Parts

Error Code – NO CODE

FAULT = Nothing happens when water flow is activated

Error Code Solutions

  1. Clean water inlet filter to water heater.
  2. On new installations ensure the hot/cold water lines are not reversed.
  3. Ensure you have the minimum flow rate required to fire the unit.
  4. Ensure water flow control turbine spins freely.
  5. Measure the resistance of the water flow control sensor, see technical data sheet behind front cover of unit for proper readings.
  6. Check for bleed overs – isolate unit from building by turning off hot water line to building. Next isolate the circulation system if present. Open your pressure relief valve; if water is flowing, there is a bleed over in your plumbing system.

 

Error Code – LC, LC0-LC9

FAULT = Scale Build-up in Heat Exchanger

Error Code Solutions

Note – when checking maintenance code history, “00” is substituted for “LC”

  1. Before servicing unit be sure to disconnect power supply.
  2. Flush heat exchanger.
  3. NOTE: The LC code is the only error code that will allow the unit to keep running. The display will alternate between the LC code and the temperature setting. The controller will continue to beep. The LC code will reset if power is turned off and then on.
  4. On newer Rinnai tankless systems there is a shutdown feature built into the product to prevent damage caused by the unit scaling up. To temporarily operate the water heater until it can be flushed push the on/off button on the temperature controller 5 times. This will give you 70 hours of service before anther LC code.

Replacement Parts 

Error Code – FF

FAULT = Indicates a serviceman has serviced product

Error Code Solutions

This code indicates a service provider performed maintenance or repair. The serviceman will enter the
following code FF after making repairs to the product. That flags the system indicating all codes after the
FF took place after he made his repairs. You can enter the FF code by; pressing the up, down and
ON/OFF buttons simultaneously.

Replacement Parts 

Error Code – NO WIFI

FAULT = WiFi not working

Error Code Solutions

  1. Clean thCheck Wifi module and connections.
  2. Replace Wifi or install WiFi system






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